Tenma 72-7730A Manuals

1 Model: 72-7730A & 72-7732A Pocket Size Digital Multimeter with USB 2 Please read these instructions carefully before use and retain for future reference. This instrument is designed & manufactured in compliance with: G84793, lEC61010-1, CAT III 600V, & CAT IV 1000V Pollution Degree 2 and Double Insulation standards. • Please operate according to this manual, otherwise the protection provided by the device will be impaired or fail. • Check the test leads, probe and case insulation condition before using. If you find any breakage, damage or abnormality, or you consider the device is broken, stop using the device immediately. • When using the test probes, keep your fingers behind the finger protection rings. • Ensure all inputs are less than the range selected otherwise it may cause electrical shock or meter damage. • Take caution when voltages are above 60V DC and 30V AC rms. • Disconnect circuit power and discharge all high-voltage capacitors before testing resistance, diode and current. • Do not use the meter with the back cover removed. • Do not adjust the range selector during measurement. • Replace the batteries as soon as the low battery indicator appears on the display. • Remove dead batteries from the meter or if it is not going to be used for a long time. • Never mix old and new batteries together, or different types of batteries. • Never dispose of batteries in a fire, or attempt to recharge ordinary batteries. • Before replacing the battery, turn off the meter and disconnect all the test probes. • To prolong battery life turn off the meter after use.. ELECTRICAL SYMBOLS GUIDE WHAT’S INCLUDED • Digital Multimeter with USB. • 1 pair of test leads. • Temperature probe. • Alligator clip. • Test clip. • USB interface cable. • CD Rom PC software. • Storage bag. • 9V battery. Low battery Grounding Warning Double insulated AC DC Measurement Fuse Diode AC/DC Measurement IMPORTANT SAFETY INFORMATION 3 OVERVIEW 1. LCD display 2. Function buttons. 3. Range selector. 4. Input terminals. Automatic Power Off • The display blanks and the meter goes into sleep mode after a 10 minute period of inactivity. • While in Sleep mode, pressing the blue button or turning the range selector will reactivate the meter. • The meter then returns to the display for the function selected with the range selector; all previously activated button features are discarded. Display Backlight • Press LIGHT button to turn the backlight on and press LIGHT again to turn it off. Press EXIT to exit the feature. • Press LIGHT to select the backlight level (low or high) in the Setup menu where you could specify a time to automatically turn off the backlight (10 seconds, 20 seconds, 30 seconds or OFF). If the period is set to OFF, the backlight feature is disabled. 1 2 4 3 RANGE SELECTOR FUNCTIONS Position Function Blue Key function OFF Turn the meter off None V DC voltage measurement None V~ AC voltage measurement None mV DC millivolt measurement None Hz % mV DC millivolt measurement Frequency measurement Frequency signal duty cycle Resistance measurement Diode test Continuity test Capacitance measurement None Hz % Frequency measurement Frequency signal duty cycle oC oF Centigrade measurement Fahrenheit measurement μA~ DC current measurement (400µA, 4000µA) Switch between DC and AC μA~ 4-20mA % DC current measurement (40mA, 400mA) Switch between AC or DC current 4~20mA loop current as % reading A~ AC or DC current measurement Switch between AC and DC • Press the blue key to access alternate functions of the main range selected. Ω 4 Function buttons • The buttons activate features that augment the function selected with the range selector. • Press the button once to access the main feature (e.g. STORE). • To access the first additional feature of the button (e.g. RECALL), press and hold the button for over 1 second. This additional feature illuminates above or on the left hand side of the appropriate keys. Note: The RANGE and EXIT buttons have only one additional feature. Button Description Access Method Range feature: Exit AUTO and enter MANUAL ranging. In MANUAL, select next input range. EXIT to return to AUTO. AUTO is default. Press the button once. Testing resistance signal from calibrator: When testing resistance signal from calibrator, it is necessary to press this button to change the maximum display to 4000 counts but the accuracy remains unchanged. Press and hold the button while turning on the meter. Setup feature: Access Setup selections, the display shows “SET”. In the Setup mode, each press of SETUP button steps to the next selection. Press and hold the button for more than 1 second. Store feature: Store the current measurement value. Press EXIT to exit. Press the button once. Recall feature: Recall the stored value. Press EXIT to exit the Recall feature. Press and hold the button for more than 1 second. Setup feature: In Setup, press to select OFF at the selection of HIGH and LOW. Press the button once after entering Setup mode. Hold feature: Press HOLD to freeze the displayed value. Press EXIT to release the display. Peak Hold feature: Press to access Peak Hold feature, the primary display shows PEAK HOLD. Press EXIT to exit. Press the button once. Press and hold the button for over 1 second. In Setup, each press to select the digit you want to edit. In Recall, press to enable SEND feature In Store, press to toggle between clearing all the stored reading or start storing reading from the current index number. Press the button once after entering Setup or Recall or Store mode. Steps to perform Peak Hold function:- Peak Value : True RMS Value (Sinewave). Peak Value is a half of Peak-to-Peak Value. Input first, then press down Peak Hold button. Press EXIT button to quit the function. If measuring high voltage first, and then low voltage, Peak Hold needs to be reset. RANGE HOLD STORE

72-7732A 72-7730A guides.com CHAPTER TITLE PAGE 1 TABLE OF CONTENTS 1. 2. 5 5 6 7 7 9 10 10 10 10 10 11 11 12 14 21 24 24 Model 72-7730A/72-7732A: OPERATING MANUAL Before You Start Overview Inspection Safety Information Rules For Safe Operation International Electrical Symbols Getting Acquainted Turning the Meter On Battery Considerations Automatic Power Off Automatic Backlight Off Low Battery Indication The Meter Structure Rotary Switch Functional Buttons The Meter Functions Vs Displays Selecting the Range Understanding the Display 2 3. 4. CHAPTER TITLE PAGE 29 29 30 30 30 32 34 35 37 39 41 43 44 45 45 45 46 46 Analogue Bar Graph Using MAX MIN Making Measurements Introduction A. Measuring Voltage B. Measuring Current C. Measuring Resistance D. Testing for Continuity E. Testing Diodes F. Measuring Capacitance G. Measuring Frequency / Duty Cycle H. Measuring Temperature I. 4~20mA loop current as % readout Using Stores, Recall and Send Features Introduction Storing and Clearing Readings Recalling Stored Readings Using Send Model 72-7730A/72-7732A: OPERATING MANUAL